IMO one common signal SELECT is enough for both pads.
And why didn't you begin with that !?
Okay, you are absolutely right ! Why did I want to control the reading of the controllers independently ... really, it is not neccessary ...
So we will control both of the controllers simultaneously with one wire (if that wire can drive both of them electronically) ...
And they will change their output state simultaneously after (for example) a pulse-3 ... and after that, I can read both of them ... okay ...
Why waste your printer port, when EnterMice is already connected to the serial port and has a free pin to use ?
It does not really matter whether there will be + 5V or + 12V.
Because of the previous, these are not important anymore ... I just did not think of the simultaneous control, I wanted to control them apart from each other, like two distinct things ... but that is absolutely not important ... you are right ...
Additional wire in the adapter responds only on connect to ground (0V).
I do not understand what this means ...
So ... As far as I understood finally ... this will be a f*kin awesome thing ...
They will work with the legacy games like normal two button joysticks,
and someones can modify existing games or can write new ones using (even simultaneously two of) 6-8 button sega controllers ...
!
And (if everything will go well) this will be available for everyone who have an EP.
And it will have a common HW design ... it seems not too important, but it is important very much !
Because there can be someone who can and will hack some hw interface for multi button controllers,
and/or can write or modify SW for it, but that will work only on that single piece of configuration ...
So this sega hack for EnterMice almost peripherical or almost seems unimportant, because EnterMice is a mouse interface with the top priority,
but because it seems to be the device every EP owner will have, now ... some programmers writing or modifying games for multi buttons can count on its sega controller driving hw capabilities ...